Reflecting electric lamp.



' H. A. n'ouGLAa Hensema Eu-:cmc LAMP. APPLICATION FILED FEB. 19 IH.

1,261,783. Patented Apnea, 1918.

, 2 SHEETS-SHEET I- H. A. DOUGLAS.

BEFLECTING ELECTRIC LAMP.v APPLICATION meppen. 19.1911.

L eTl 9u Lw PL. An E H m.. 2 m, ,a D..

VriTED BEST AVAILABLE lnog oFfBRoNsoN, menten' Applictin met tric Lamps,"of .which the followingie a full, l 'fLjik partsjfare indicatedf-byfslmilf'he.

thi' 'part oi tiens; a.;

20 'itnpnoyandT facilitate the aesernbly theljeff j 4W'th'a'l Contact carrier or carriers. x `In carry- 'j ing-out thisffeature. o f "the `in've'ntion the ljay()net,v lt int/lie; shell is Eeontinued'inwardly beyond a f bayonet seat forined 25 therein 4vto elongate suchl Slot and thereby iilreijeasethe length of lthe splitin the Shell that it 'ee'cte. may havean add Aial bayonet' seat tofaccominodalte a seconu ',ontact carrier.

inner end` of said-slots has two'seats for alternative engagement with the Second contactfcarri'ei" to "enable such carrier 'to-#bov I will explain Vmy invention more fully` by" reference to'y the accompanying drawings I showingthe preferred embodiment thereof View in elevation, "partiallyin'j sectiongof y portions-ofthe Strllcture' shownin'ffF Fig.' 4 isv a View on linee-44 ofl Fig. 3;"

Fig. 5 is -a View on line ,5-5 of Fig'Q-"g" Fig. 6 isa perspective view showing the arts vfof' the connector of `my invention nf- 'epfai'ated relation; the -forWard-Contact'earrn" donPoRAmoN 0F Mien i'odcation of a connector shell :toi

The, inner end of'this slot.

Lreferente teh-roughqutx the d1 ffe'ren t" c l he 'concave'reieotor'lds v:received in andy "i" A itably coupled with they reflector carry- Y goncave'caSing"2;-spaee intervening betweni'the rearf-portivn''slofy the 'reflector fft'he AIge'fleetor 'Aint the eac'ef betnl reflectorj'a'nd`casing- -f Ajsprinv tongue' ,l5 iS'f integrallyffor clmwith a shell 5 .that con# 70- stitutes -a-hold ry forfcontactcarriere, 4ths wf.' spring tengne havingjample,clearance at its sidel margine td perrnit it freely to`1`fnnotio1il H Soineipart of tleftongue". "such'asy tllerear therefrom iswnarrower than the 'balli' ,"3 ance of'jthet nGuean'd is vslightly narrower;

than va-"slot '7 1n holder Swheifebythis v lf thi 30"latt er Contact carrier isa switchingv plug the portion majfpiject 'into,the"s1ot to pljeyent thesI-ell vfrom turning` 'with i"e'fspfet` to tlieS sylotlwhileat the same tmethefside ,nnargin` of the tongue 4 lareadapted topi'es against' theiside-.marginsof the-slot 71M The tongue thusv 'presses' upon a surface of the holder A BEST AVAILABLE COP` g' i "i,aei,7ea

y provided with bayonet`pins-12 engageable 'and the parts withinit are in front of. the 65 f within bayonet seats 1B constituting'paijts .casin'g2 and in order that the switchin plu v .o f bayonet slots 14. ByI continuing'theslot I5 may be turned or otherwise-move wit ,1 '14 beyond the Seat"13, the shell is further' resie'ct'to the lampbaseto cut thel'ampiin l? 6 Asplit'to enable -it to have more tight engage- 'an out of'circuit 'I employ a motion transmentV with the contact-'carrier 9 which is .mittingconne'ctiom lpreferably in the-form 70 snugly received in theshell. `The rear contween'the rear portions of the cas1ngand 1o reiector is provided with `terminalblocks 16.

having'binding screws 17 by which. circuit wires may be securedlto the termini'ilblocks.v A

Theseterminal blocks ure 'cylindrical' and the'forward endsthereof are tubular, springs.

1 5'18 being included'in the tubularportions of the yteri'ninal blocks and operating'to press contacts'19 and 20 forwardly into engager ment with .the contacts 10 and 11., uIL'of these-contacts being within the casing. The

20 'springs 18 andthecontacts `19 and 20,tl11is' not. only dserve to establish circuit. for the of .a forwardly and rearwardly movable and tact carrying-plug 15' within the space 'berotatable switching rod or motion transmitting. element 24,. which is connected 'at its' inner end with theswitchin plug ,which --is movable backand forth an whichfodis 15 extended rearwardly to eoperable from the exteriorojf thecasmg. 1

.. Av rotatable sleeve 26 has its rear end alt the exterior 0f the Casing, this rear'end beli l. ing reduced and knurled so'that it. mayv .8o-

readily be grasped to turn the sleeve.4v The bore ofthe sleeveisfin threaded engagement with the/rear end of the rod 24.. TheV ex A lternal part 'of head piece`25- constitutes an abutment and there is la second nbutment's l. fgftheshel p -25 The plug 15 is pi'eferabl rotatable lwithlamp but also operate Vto hold the lump base. y27 lIpOn the interim 0f the C llSiIlg, these @70v 9 in ba onetgpin land slot connection with` abutments beingheld in rigid relationjwith f5., cach other and in turning relationv with the' casing b'y means of. tongue formations 28 inl'the rear' end of the shel 5 in order that .that are. passed through openings 29l inthe 90 it may `perform its switching function and abutment 27 -aiidwhicliz are turned over; (aS" l'fwhen thus inovablymountedit is desirably lIndicated inFig.' 2) to.affordpropel?` Space provided with bayonet p ins 21 which are rebetween the abutments m wluclf'fhe sur- 4 l` 130 `"ceiva'ble innlternnte bayonetgseats 22, 23., thev rplmdingportion of' the part or handle-conf p lugbeingdcsirnblyinsertedffrom the front -ztlnuation 21' of the casing 'may be received. 95

end of the' shell -with its pins p iissing ,1fv along thls arrangementxthe rod turning head f '.thebayonet slots 11i-until they are in-.the zone- 'P1090 1S @Ollfld t0 a Slllle P1311@ 0f IQv' ,lzflt includostho transversely spacedfu'part tation, the partsthereoi' 'i1ch have been ya" inner ba Duct lseats 22, 23 wliei'enfter the. termed abutmets'el'gglllg the ends 0f the enlarged pa'rtwoflthe sleeve 26 so` that;the'1o0 baseof t ie. lamp bulb is inserted in the shell with itsy pins 12 placed-in the bayonet seats\ 13. The endof the shelll adjacent the plug 'sleeve 261s also confined to a single' planel of"rotn` ton. By turning the `sleeve the rod i is circumfcrentially continuous', it being un- 2tmuybe moved back andforth to adjust' 40 necessary to .slot this fend of tlieshell to *lm lllmp.bUlb7 -8 Wlth i'espectto the reflector c afford the pin and slot engagement between 1'. The vhendlplcce-25 may 'be turned' with 105 the` rotatable .contact carrier andthej'shell' respect to the sleeve 26 and in order Ithat-it4 r 4that leiinesthe limitsv ot rotation of the romglyturn the A rod 24' the abutment partf?, tatnbl contact. carrier. The springs 18 thus of. the .head piece carries a: square tubular 45 'not only sci-ve to hold the bayonet pins 12 in 0nd 30 -@n.l'ugll'lgthe lSquare end'ofihe. IOd the seats but-fnlso serve to li'old the bayonet pins 21 in vthe seats to which they are ad.- ;COIIleIf OrtiOnS O f i911@ Square end Qf'the rod justed. 24metjreaded to engage the threads inthe@ It will be observed thntthe complemental sleeve 26 but. these threads are I nerely sur.- oswitchiug contacts 10 and 19 are eccentric Founded by the square tubeBO-'Wlthoutl'bavwith respect to the shell as'are also the commg any' engagement of their'own-with the Il plcmcntal switchingl contacts 11 and- 20 so head-piece, the engagement of the head piece thjat as the plugis turned these contacts are with the rod being confined to the fiat faces 'cither broughtinto eng gcmentror are sep of the sqllllareend ofthe rod and the inner iatf 54x55; arat'ed according 'to thdldirectio'n of move- 'faccsoft esquaretubeo. Thustherod24mav 24 that is shown most clearly inFig. 7.. The 110 l ment' of theA switching. plug1`5.' .When thebe increlvfmoved in and out by turningzthe V120 lamp is in open "circuit the contactsltjand 20 are pressedagainsnthe inulating porl- 18 contnutojmaintain `the bayonetv pins 'upon' vthe. switching plug 'and upon thea-lampbasein- .their respective bayonet? seatsi vThe` f shell sleeve 26 alone or. may be merely turned-by turning lthe headpiece l2aB-'alone respectively."

Hcctorlor to switjc the lumpin and out of circuit. v

to adjust-the lain with respectto therelarly Adescribed the' preferredxembodiment of my ,inventiong'l do not wshto'beflimited to 1 55 atljustn'ient of the bulb;

in ejplnc within the space pm tions ol' the precise detailjof .con-struction showndaS changes may -readily'f be "madewithout-departing fr'rifthe spirit of my Vinvention;but hav-ing thuis de ecribed niy' invent-iomllaii bination Witha refiectorcarrying.casing; of

(one upon the plug;

cuit, therebeing` e'ngageable eccentrically lo-l cated Switching 'contacts rthe lamp circuit, c

a motion transmitting;`

rod extendingfrom the plug and operable from the exterior of thecasin'g to turn said nlug; anda head piece for the rod and engged' with the casing to confine `it vto a Vsingle plane of rotation.

2. In a reflecting electric lamp, the combination With'a casing; of a reflectorv in front` of the casing, space 'intervening between the rear portions of' the casing -and. reflector; an electric lamp bulb; a shell carrying'the lamp bulb at its front and ,movable forwardly 'wardly and rearwardly ein 'or out to move and rearwardly` to effect focal adjustment of the bulb; a contact carrying plug4 within the space betu'een the rear port-ionsot' the reflector and the casing and coupled with the `shellto be movable forwardly and rearwardly thereivith in the focal adjustment of the bulb and serving to Supply current. to the lamp.v the plug;- also'b'eing inounted'to turn with respect to the shell to cut the lamp in and out of circuit, there being engageablc and ,seran-able switching contactsv in the lan'ip circuit, one upon the plug; Aand a formovable and rotatable motion.transmitting element connected -with and extendingrearivardly from-the the exterior ofthe f an'electric lamp bulb; a shellfcarryingthe 11o plugand .operable from easing to turn. saidplug' to switch the lampinto or out of' circuit and to movethe plug front ol the easing, Space intervening b ecasing and rct'\veen the rear portions;` of the 'a shell carfleetor: an i-.leetritlamp bulb;

I rvingf the lamp bulb at its front and movable toriva rdl y and rearwardly to effect focal a contact carryloetween the :rear the reflector and the casing; and `coupled n'ilhthe shell to be movable for- \varill v and rearwardly therewith inthe lo-al ai'ljustnient of the bulb and serving toc supply rari-ent to the lamp, the plug also lining' mounted to turn with respect to the `hell lo cut the lamp in and out of circuit,

y Letters-@attent iteriiol 'o'fthe ng, t ,turn plut,

to inove the plug 1.11 front end; a contact car- `formed to furnishftu- `ing circuit.v .c y i y A` connector including' a contactj" car extending 4the other and Ifornied with a-egeat vat anfi'n- '1 00 ,formed to speet lo'the shell; and

' ,BlsveaetrCOP separablesiuitchoi" fout of circuitfnd or/outate moyethe shell and thereb)`7r` effect focaladjustment of the bulb; and ahead piece'` .for therod Wherc- 75 bytlielrod may .be turned andv with respect to which the .rod isl longitudinally movable,

said head piece being confi1i'el -to, substan `tially a Single plane of` rotationv by 1y the casing... l

' 4. Ayco'nnector iuclufdingw-zt contact carrier having La--lraiyonct pin; ashell receiying the contact. ca1rie1',"saidfshell having a "sl0.t Y

v exteiuling'from one end of' thej shell toward, the other4andaerinedg-With a `s'eatat any in- 85 terniedliate f J sind' seats; 'anda rotatable swi'tclingi.v iying plug-Within .the -shelllrm'inga bayonet pin alternately `i '.,e,ceiyable in, saidlatter bayonet Seats and forming. .with the first con-v tact carrier a Switch for opening and closrior having a bayonet pin;l a shell receiving the contact carrier,-;said shell having a' slottroni `o1 `1e=e'nd ofthe shelltowa'rd l terinetliate portion inwvhicb said bayonet piu isreceivable in assembling the shell and carrier, the inner end of Said ,slot being furnish an additional u bayonet` Y seat; and a contact carrying plu-g withinthe shell having aybayonet vpin receivable in said ,latter bayonet scat.-

G. ln a1reflecting electiric lamp, the combilamp bulb at its frontend; switching contact,` \\"i'tf. l.iiii. i=tlie casing for, cutting the lamp of the shell andthe Y the v inout 'of circuit; a` plug within theiesi'ngand 4'mounted to. turn in the shell and oupied th ..1 therewith undcarrying one Vof said ontacts; and means operble froml the exterior of the 5 sing for turning the plug to eut the lamp in and out of circuit, and for effecting move? A A .A .1.261.783

mentof thers`hell and the lamp bulb in und'l BESTAVAILABLE ce@ e reflector.

out to adjust the dnip bulb with respect to j In witness whereof, I hereunto subsqribe 1o Amy name this .24th day of January vHARRY A. DOUGLAS. 

